1SMA5929BT3G

onsemi · Zener Diodes · SMA

1SMA5929BT3G from onsemi, in a SMA. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	CATHODE	passive	Cathode terminal, marked by the polarity band on the SMA package; the 1SMA5929BT3G regulates in reverse bias at a nominal 15 V (VZ 14.25 V min to 15.75 V max) measured at IZT = 25 mA.
2	ANODE	passive	Anode terminal, the forward-biased side; forward voltage is 1.5 V max at IF = 200 mA, and the device is rated for 1.5 W DC power dissipation at TL = 75°C.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SMA
Category	Diodes
Pins	2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Reverse Zener Voltage @ IZT	VZ	14.25	15	15.75	V	@ IZT = 25 mA	2
Zener voltage tolerance (type number designation)		-5		5	%	Per Note 3: type number indicates 5% tolerance	2
Maximum Zener Impedance @ IZT	ZZT			9	Ω	@ IZT = 25 mA	2
Maximum Zener Impedance @ IZK	ZZK			600	Ω	@ IZK = 0.25 mA	2
Maximum DC Zener Current	IZM			100	mA(dc)		2
Forward Voltage	VF			1.5	V	@ IF = 200 mA	2
Reverse Leakage Current	IR		0.5		µA	@ VR = 11.4 V	2
DC Power Dissipation @ TL = 75C, measured zero lead length (Note 1)	PD			1.5	W	TL = 75C, measured zero lead length (Note 1)	1
DC Power Dissipation @ TA = 25C (Note 2)	PD			0.5	W	TA = 25C (Note 2)	1
Thermal Resistance, Junction-to-Lead	RθJL		50		C/W	Junction-to-lead, 1 in square copper pad, FR-4 (Note 1)	1
Thermal Resistance, Junction-to-Ambient	RθJA		250		C/W	Junction-to-ambient, FR-4, ON Semiconductor minimum recommended footprint (Note 2)	1
Operating and Storage Temperature Range	TJ, Tstg	-65		150	C		1

CAD (KiCad official)

Symbol: 1SMA5929BT3G
Footprint: Diode_SMD:D_SMA
3D model: SMA (KiCad packages3D, STEP)
3D model files: 1sma5929bt3g-etched.step / 1sma5929bt3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 1sma5929bt3g.step / 1sma5929bt3g.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: onsemi datasheet (5 pp, sha256 1ca169f64a35c9ee, retrieved 2026-10-21, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

# 1SMA5929BT3G

**onsemi** · Zener Diodes · SMA

1SMA5929BT3G from onsemi, in a SMA. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CATHODE | passive | Cathode terminal, marked by the polarity band on the SMA package; the 1SMA5929BT3G regulates in reverse bias at a nominal 15 V (VZ 14.25 V min to 15.75 V max) measured at IZT = 25 mA. |
| 2 | ANODE | passive | Anode terminal, the forward-biased side; forward voltage is 1.5 V max at IF = 200 mA, and the device is rated for 1.5 W DC power dissipation at TL = 75°C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SMA |
| Category | Diodes |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Reverse Zener Voltage @ IZT | VZ | 14.25 | 15 | 15.75 | V | @ IZT = 25 mA | 2 |
| Zener voltage tolerance (type number designation) |  | -5 |  | 5 | % | Per Note 3: type number indicates 5% tolerance | 2 |
| Maximum Zener Impedance @ IZT | ZZT |  |  | 9 | Ω | @ IZT = 25 mA | 2 |
| Maximum Zener Impedance @ IZK | ZZK |  |  | 600 | Ω | @ IZK = 0.25 mA | 2 |
| Maximum DC Zener Current | IZM |  |  | 100 | mA(dc) |  | 2 |
| Forward Voltage | VF |  |  | 1.5 | V | @ IF = 200 mA | 2 |
| Reverse Leakage Current | IR |  | 0.5 |  | µA | @ VR = 11.4 V | 2 |
| DC Power Dissipation @ TL = 75C, measured zero lead length (Note 1) | PD |  |  | 1.5 | W | TL = 75C, measured zero lead length (Note 1) | 1 |
| DC Power Dissipation @ TA = 25C (Note 2) | PD |  |  | 0.5 | W | TA = 25C (Note 2) | 1 |
| Thermal Resistance, Junction-to-Lead | RθJL |  | 50 |  | C/W | Junction-to-lead, 1 in square copper pad, FR-4 (Note 1) | 1 |
| Thermal Resistance, Junction-to-Ambient | RθJA |  | 250 |  | C/W | Junction-to-ambient, FR-4, ON Semiconductor minimum recommended footprint (Note 2) | 1 |
| Operating and Storage Temperature Range | TJ, Tstg | -65 |  | 150 | C |  | 1 |

## CAD (KiCad official)

- Symbol: `1SMA5929BT3G`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA (KiCad packages3D, STEP)
- 3D model files: `1sma5929bt3g-etched.step` / `1sma5929bt3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma5929bt3g.step` / `1sma5929bt3g.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/1sma5929bt3-d.pdf) (5 pp, sha256 `1ca169f64a35c9ee`, retrieved 2026-10-21, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/1sma5929bt3g-datasheet.pdf)